安卓存储资源

本地永久存储字符串

public void saveAsFile(String content)
    {
        String headPath=android.os.Environment.getExternalStorageDirectory()+"/aaa/mdoor.txt";
        FileWriter fwriter=null;
        try {
            fwriter=new FileWriter(headPath);
            fwriter.write(content);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            fwriter.flush();
            fwriter.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public void readFile()
    {
        String headPath=android.os.Environment.getExternalStorageDirectory()+"/aaa/mdoor.txt";
        File file = new File(headPath);
        BufferedReader reader=null;
        try {
            reader= new BufferedReader(new FileReader(file));
            String tempString =null;
            
                while((tempString=reader.readLine())!=null)
                {
                    Log.e("paytest","json"+tempString );
                    content=tempString;
                }
            
            reader.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(reader!=null)
            {
                try {
                    reader.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

从网上下载图片信息然后存储到本地

public void savePIC()
    {
        Bitmap bitmap = null;
        try {
            
            bitmap =getPicture("https://qmby.feefoxes.com/h5/newlegend/version1/wechatapp/sharetest.jpg");
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Log.e("paytest", "aaa");
        }
        try {
            saveBitmap(bitmap);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Log.e("paytest", "hhh");
        }
    }
    public void saveBitmap(Bitmap bitmap) throws IOException {
        //更改的名字
        String imageName="wwwwa"+".jpg";
        
        String headPath=android.os.Environment.getExternalStorageDirectory()+"/aaa";
        Log.e("headPath", headPath);
        Log.e("headPath", headPath);
            File headDir=new File(headPath);
            if(!headDir.exists()){
                headDir.mkdirs();
            }
            System.out.println(headPath+"
"+headDir);    
            FileOutputStream headFos=null;
            File headFile=null;
            try{
                //重命名并保存
                headFile=new File(headPath,imageName);
                headFile.createNewFile();
                
                headFos=new FileOutputStream(headFile);
                bitmap.compress(CompressFormat.JPEG, 100, headFos);
                headFos.flush();
                
            }catch(Exception e){
                e.printStackTrace();
            }finally{
                if(headFos!=null){
                    try {
                        headFos.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        
    }
    /*
     * 从服务器端得到图片
     */
    public Bitmap getPicture(String path) throws Exception
    {
        Bitmap bm=null;
        URL url;
        try {  
            SSLSocketFactory.getSocketFactory().setHostnameVerifier(new AllowAllHostnameVerifier());
            url = new URL(path);//创建URL对象  
            URLConnection conn=url.openConnection();//获取URL对象对应的连接  
            conn.connect();//打开连接  
            InputStream is=conn.getInputStream();//获取输入流对象  
             /*String filepath=null;
             if(numberPic==1)
             {
                 filepath="tempDir"+numberPic+".png";
             }else if(numberPic==2)
             {
                 filepath="tempDir"+numberPic+".jpg";
             }
             byte[]data =readInputStream(is);
             
             File imageFile =new File(filepath);
            
            FileOutputStream outStream = new FileOutputStream(imageFile);
            
            outStream.write(data);
            
            
            Log.e("data", ""+outStream);
            Log.e("data", ""+outStream);
            */
            bm=BitmapFactory.decodeStream(is);//根据输入流对象创建Bitmap对象  
//            outStream.close();
//            is.close();
        } catch (MalformedURLException e1) {  
            e1.printStackTrace();//输出异常信息 
            Log.e("paytest",""+"url");
        }catch (Exception e) {  
            e.printStackTrace();//输出异常信息  
            Log.e("paytest",""+"bb");
        }  
        return bm;
    }